Google shows that /elif is a 'thing' in python, where apparently they limit elseif to having only 1 of them, while elif is not limited. But we've already got /elif capability with /elseif, and the only thing that adding /elif would do is create a duplicate /command so that scripts are easier to read.

I counter-propose that, instead of creating a new /command that duplicates the functionality of /elseif, and would limit those scripts from running in older versions, that your desired effect could be achieved by having mid-denting of the script, so that if 'else' is preceded by an 'elseif', that the 'else' be followed by at least 2 spaces, and that if 'if' is followed by 'else' but not 'elseif' that the 'if' has 3 trailing spaces, and make it 5 spaces if the 'if' is trailed by an 'elseif'.

Code
if   (foo == bar) { commands }
else { commands }

if     (foo == bar) { commands }
elseif (foo > bar) { commands }
elseif (foo < bar) { commands }
elseif ($me == foo) { commands }
else  { commands }